165830513 has 4 divisors (see below), whose sum is σ = 168549108. Its totient is φ = 163111920.

The previous prime is 165830507. The next prime is 165830531. The reversal of 165830513 is 315038561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7246864 + 158583649 = 2692^2 + 12593^2 .

It is a cyclic number.

It is not a de Polignac number, because 165830513 - 2⁶ = 165830449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165830513.

It is not an unprimeable number, because it can be changed into a prime (165830503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1359206 + ... + 1359327.

It is an arithmetic number, because the mean of its divisors is an integer number (42137277).

Almost surely, 2^165830513 is an apocalyptic number.

It is an amenable number.

165830513 is a deficient number, since it is larger than the sum of its proper divisors (2718595).

165830513 is an equidigital number, since it uses as much as digits as its factorization.

165830513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718594.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 165830513 is about 12877.5196757761. The cubic root of 165830513 is about 549.3993586183.

The spelling of 165830513 in words is "one hundred sixty-five million, eight hundred thirty thousand, five hundred thirteen".